Техническая литература
Различные книги в жанре Техническая литератураDigital Audio Broadcasting
Now the standardisation work of DAB (Digital Audio Broadcasting) system is finished many broadcast organisations, network providers and receiver manufacturers in European countries and outside of Europe (for example Canada and the Far East) will be installing DAB broadcast services as pilot projects or public services. In addition some value added services (data and video services) are under development or have already started as pilot projects. The new digital broadcast system DAB distinguishes itself from existing conventional broadcast systems, and the various new international standards and related documents (from ITU-R, ISO/IEC, ETSI, EBU, EUREKA147, and others) are not readily available and are difficult to read for users. Therefore it is essential that a well structured technical handbook should be available. The Second Edition of Digital Audio Broadcasting has been fully updated with new sections and chapters added to reflect all the latest developments and advances. Digital Audio Broadcasting: Provides a fully updated comprehensive overview of DAB Covers international standards, applications and other technical issues Combines the expertise of leading researchers in the field of DAB Now covers such new areas as: IP-Tunneling via DAB; Electronic Programme Guide for DAB; and Metadata A comprehensive overview of DAB specifically written for planning and system engineers, developers for professional and domestic equipment manufacturers, service providers, as well as postgraduate students and lecturers in communications technology.
Securing Wireless LANs
Wireless LANs will enable small teams and communities to communicate via their mobile devices without cables. This new technology will facilitate communication in small businesses/teams such as in hospitals, on construction sites, warehouses, etc. Held provides a comprehensive guide to the implementation, planning and monitoring of all aspects of wireless LAN security in small offices/small to medium business (SMBs). Securing Wireless LANs is timely in addressing the security issues of this important new technology and equips its readers with the tools they need to make the appropriate choice for their own situation. This ideal introduction to wireless LAN technology: * Provides a broad overview of all the different issues and practical guidance of how to make wireless LANs secure at home as well as in small offices * Explains how to monitor wireless LANs, configure different types of wireless equipment * Discusses which technologies are best for different situations and requirements * Gives practical hints and advice on how to implement them
Perspectives on Multimedia
The uses of multimedia are rapidly increasing. Its power to present information in ways not previously possible and its integration of resources, allow for the creation of rich learning environments. Perspectives on Multimedia: Communication, Media and Information Technology provides a critical examination of the latest multimedia developments and approaches, such as Interface Technology and QoS architectures. Topics covered include: The key concepts intrinsic to digital forms of multimedia: integration, interactivity, hypermedia, immersion, narrativity and hybridity. The development of Information Technology (IT) usage in society and in the business community. How modern IT enables private companies and public organisations to support business operations, create new business opportunities, and to promote more proactive service management. Multimedia from a computer science perspective and how computer science provides the technical foundation for the computer software and hardware that drives the information age. Gives a broad range of perspectives on key issues for interactive multimedia in organisations and industry today. This book will be of interest to practitioners involved in multimedia development in an organisation, management consultants giving professional advice on digital solutions and information technology matters to their customer organisations and academics focusing on business and technical aspects of multimedia frameworks.
Understanding Changing Telecommunications
The field of telecommunications is becoming ever more complex. In order to manage the new Telecom industry it is necessary not only to understand its 3 main components, namely the end users, the technology and networks, and the business aspects, but also their vital inter-relationships. Complexity leads to uncertainty, and one effect of uncertainty is for people to underestimate the complexity of the business and the technology. This book takes a holistic approach to the subject and can be used as a tool for decreasing this uncertainty. During 2000 many operators paid extremely high sums of money for 3G licenses in a number of European countries, supposing a potential corresponding and balancing revenue from mobile services in the new frequency band. Obviously today the licenses are questionable. Consequently, suppliers and operators were forced to reduce their international work force. What are the underlying reasons? Since the true rate and level of development was hardly foreseen by anyone, the picture is complex, including factors such as psychology and belief in a new economy. It is immediately clear that the end user impact has been severely under-estimated. It is also clear that the expected development has and is happening, with more speed than expected, and continues to be complemented with solutions such as wireless LANs. This book treats the paradigm shift from a number of angles: user needs and demands, deregulation of telecom and the convergence between telecommunications, data communications and the media industry, the service plan, service implementation, QoS, and Security. Understanding Changing Telecommunications focuses on the overall principles and context of the new telecommunications world rather than on high-level technical descriptions in order to aid the understanding and development of the next generation of telecom networks. e.g. multimedia over IP and 3G. Discusses the development of telecommunications up until 2005 Provides a holistic view of the world of telecommunications Covers three main areas: End-users, Technologies and Networks, and Telecom Business, and their vital inter-relationships Offers support and advice for those needing to implement business plans Essential reading for staff with operators and providers involved in the telecom networks, especially management, planning and design, development, integration and training, as well as Business analysts and investors keen to understand the current state of the Telecom industry.
Advanced Wireless Communications
The wireless community is on the verge of the standardization of fourth generation (4G) systems. Research has generated a number of solutions for significant improvement of system performance. The development of enabling technologies such as adaptive coding and modulation, iterative (turbo) decoding algorithms and space-time coding, means that industry can now implement these solutions. Advanced Wireless Communications: 4G Technologies focuses on the system elements that provide adaptability and reconfigurability and discusses how these features can improve 4G system performance. There are several different systems comprising 4G, including adaptive WCDMA (Wideband Code Division Multiple Access), ATDMA (Adaptive Time Division Multiple Access), Multicarrier (OFDMA) and Ultra Wide Band (UWB) receiver elements. This book provides a comparative study of these technologies and focuses on their future co-existence. Topics covered include: Space Time Coding, including discussions on diversity gain, the encoding and transmission sequence, the combining s cheme and ML decision rule for two-branch transmit diversity scheme with one and M receivers. Ultra Wide Band Radio, UWB multiple access in Gaussian channels, the UWB channel, UWB system with M-ary modulation, M-ary PPM UWB multiple access, coded UWB schemes, multi-user detection in UWB radio, UWB with space time processing and beam forming for UWB radio. Antenna array signal processing with focus on Space-Time receivers for CDMA communications, MUSIC and ESPRIT DOA estimation, joint array combining and MLSE receivers, joint combiner and channel response estimation and complexity reduction in the wide-band beam forming Channel modeling and measurement, adaptive MAC, adaptive routing and TCP layer are also addressed. This book will supply the reader with a comprehensive understanding of the relationship between the systems performance, its complexity/reliability and cost-effectiveness. It gives an insight into the impact of existing and new technologies on the receiver structure and provides an understanding of current approaches and evolving directions for personal and indoor communication.
Software Defined Radio
The impending advent of GSM in the early 1990s triggered massive investment that revolutionised the capability of DSP technology. A decade later, the vastly increased processing requirements and potential market of 3G has triggered a similar revolution, with a host of start-up companies claiming revolutionary technologies hoping to challenge and displace incumbent suppliers. This book, with contributions from today's major players and leading start-ups, comprehensively describes both the new approaches and the responses of the incumbents, with detailed descriptions of the design philosophy, architecture, technology maturity and software support. Analysis of SDR baseband processing requirements of cellular handsets and basestations 3G handset baseband – ASIC, DSP, parallel processing, ACM and customised programmable architectures 3G basestation baseband – DSP (including co-processors), FPGA-based approaches, reconfigurable and parallel architectures Architecture optimisation to match 3G air interface and application algorithms Evolution of existing DSP, ASIC & FPGA solutions Assessment of the architectural approaches and the implications of the trends. An essential resource for the 3G product designer, who needs to understand immediate design options within a wider context of future product roadmaps, the book will also benefit researchers and commercial managers who need to understand this rapid evolution of baseband signal processing and its industry impact.
Content Production Technologies
We are currently in a digital content era. With the increase in circulation of multimedia content globally via the internet it has lead to the need for reuse of content stored in archives; the utilisation of newly stored materials; partially finished broadcasting programmes and finished content. This book proposes to show solutions to these numerous content issues. It will discuss large scale archives for significant content and a retrieval method for large scale archives and remote editing. The book will also examine the protection of intellectual property rights, which is one of the most important issues facing content owners. Examines the design and implementation of a practical digital content production system Proposes to show solutions to various content issues Covers various retrieval methods for large-scale archives using MPEG-1 streaming technology and remote editing using an original time code Discusses large-scale video archive systems which will enable high speed retrieval and edit functions for large amounts of video data with multi-purpose applications A resource that all broadcast engineers, systems integrators and engineers for equipment manufacturers will find invaluable. The thorough approach to this topic ensures that this title will become the standard reference for R&D specialists in content production and digital archiving.
Software Defined Radio
The Software Communications Architecture (SCA) establishes an implementation-independent framework for the development of Joint Tactical Radio System software configurable radios. It specifies the Operating Environment, services and interfaces that applications use. Software Defined Radio: The Software Communications Architecture focuses on the issues and benefits associated with developing a radio system in compliance with the SCA specification. This book provides a comprehensive, practical introduction to building a SCA-compliant system taking the reader through the historical and conceptual background to help filling in the gaps between the intent of the SCA specification and the practice. Key features: Presents a practical approach to the Software Communications Architecture Provides an example-oriented understanding of the usage of the SCA and thus allows the reader to extend the concepts and practice to more complicated multi-processor distributed environments. Covers the Operating Environment: a Core framework, CORBA middleware, POSIX operating systems and Domain profiles. Features an accompanying website with appendices, and links to further information on the SCA. This invaluable reference will provide applications programmers, designers, professional researchers, wireless manufacturers and operators with an indispensable guide to the Software Communications Architecture. Advanced undergraduate and postgraduate students on mobile and wireless communications courses will also find this to be an excellent guide to the topic.
Software Defined Radio
Software defined radio (SDR) is a hot topic in the telecommunications field, with regard to wireless technology. It is one of the most important topics of research in the area of mobile and personal communications. SDR is viewed as the enabler of global roaming and a platform for the introduction of new technologies and services into existing live networks. It therefore gives networks a greater flexibility into mobile communications. It bridges the inter-disciplinary gap in the field as SDR covers two areas of development, namely software development and digital signal processing and the internet. It extends well beyond the simple re-configuration of air interface parameters to cover the whole system from the network to service creation and application development. Reconfigurability entails the pervasive use of software reconfiguration, empowering upgrades or patching of any element of the network and of the services and applications running on it. It cuts across the types of bearer radio systems (Paging to cellular, wireless local area network to microwave, terrestrial to satellite, personal communications to broadcasting) enable the integration of many of today's disparate systems in the same hardware platform. Also it cuts across generation (second to third to fourth). This volume complements the already published volumes 1 and 2 of the Wiley Series in Software Radio. The book discusses the requirements for reconfigurability and then introduces network architectures and functions for reconfigurable terminals. Finally it deals with reconfiguration in the network. The book also provides a comprehensive view on reconfigurability in three very active research projects as CAST, MOBIVAS and TRUST/SCOUT. Key features include: Presents new research in wireless communications Summarises the results of an extensive research program on software defined radios in Europe Provides a comprehensive view on reconfigurability in three very active research projects as CAST (Configurable radio with Advanced Sodftware Technology), MOBIVAS (Downloadable MOBIle Value Added Services through Software Radio and Switching Integrated Platforms), TRUST (Transparently Re-configurable Ubiquitous Terminal) and SCOUT (Smart User-Centric Communciation Environment).
Multimedia Messaging Service
The Multimedia Messaging Service (MMS) is regarded as the best-of-the breed of proven messaging technologies, surpassing SMS and electronic mail to offer a truly multimedia experience to mobile users. The first commercial solutions appeared on the market in 2002 and the penetration rate of MMS is now quickly approaching the required level for mass-market adoption. By leveraging accessible technologies, MMS has gained wide acceptance from major market players and provides great business opportunities for the whole telecommunications industry. Introduces usage scenarios and provides a comprehensive description of enabling technologies for MMS, from version 1.0 to version 1.2 (featuring message content classes, video support, online message boxes, digital rights management, etc.) Demystifies MMS standards by clearly illustrating technical explanations with numerous practical examples, from the design of multimedia messages to the interfacing of applications with MMS centres Sheds light on common implementation pitfalls and known interoperability issues Based on the author’s own experience as a standardization expert and software architect for one of the major handset vendors, Multimedia Messaging Service provides a stimulating practical reference book for network operators, content designers, device manufacturers and developers of messaging applications, and will also appeal to researchers and students.